Nonpareil Yb Behavior inYbMn6Ge6−xSnx

Possible room-temperature signatures of unconventional 4f -electron quantum criticality in YbMn6Ge6−xSnEichenberger1, Magnette2, Malterre3 et al. 2020Phys. Rev. BSelf Cite91270View full textAdd to dashboardCite

“…In YbMn 6 Ge 6−x Sn x materials, homogeneous intermediate valent Yb coexists with a magnetized 3d sublattice [14][15][16][17], while Yb is typically alloyed with nonmagnetic elements in the quantum-critical metals that were mentioned above. The hexagonal HfFe 6 Ge 6 structure type of the considered materials comprises one site for Mn, one site for Yb, and three sites for the p elements.…”

Intermediate valence to heavy fermion through a quantum phase transition inYb3(Rh1−xTx)Binod1, Oswald2, Chan3 et al. 2016Phys. Rev. B231170View full textAdd to dashboardCite

“…Therefore, compounds with Ce or Yb can be tuned with extrinsic parameters such as pressure, magnetic field, or doping, resulting in a variety of states such as heavy fermion (HF), 1-3 superconductivity, 4 intermediate valence, 5 and mixed valence 6,7 . While existing literature often uses intermediate and mixed valence terminology interchangeably, these actually refer to two distinct behaviors: temperature-dependent or temperature-independent mixtures of both magnetic and non-magnetic rare earth ions.…”

Pressure-induced anomalous valence crossover in cubic YbCu5-based compounds

“…Recently, anomalous temperature dependences of the Yb valence have been also reported for the Yb compounds like Yb x Fe 4 Sb 12 20 and YbMn 6 Ge 6− x Sn x 26 . For the latter case, a scenario based on the presence of magnetically ordered Mn moments and on an Anderson Hamiltonian with a Zeeman term modeling the magnetic interactions was proposed to explain the unusual temperature dependence 26 .…”

“…For the latter case, a scenario based on the presence of magnetically ordered Mn moments and on an Anderson Hamiltonian with a Zeeman term modeling the magnetic interactions was proposed to explain the unusual temperature dependence 26 . Note that in cubic YbCu 5 such magnetically ordered moments do not exist.…”